Refractory gold ores present significant challenges to conventional extraction methods. In these ores, gold is tightly encapsulated within sulphide minerals or locked by carbonaceous matter, thereby ...
In April, U.S. Sen. Tina Smith introduced a bill to protect the Boundary Waters wilderness, building on years of advocacy by U.S. Rep. Betty McCollum and support from Backcountry Hunters and Anglers, ...
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